A cobpobation



H. M. BURR AND G J. INGRAHAM.

INSULATING, WATERPROOF SOLE FOR USE ON BOOTS AND SHOES. APPLICATIONFILED IULY 2 \919.

1,347,775. Patented July 27; 1920.

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Rubber and Asbgdus Fiber UNITED STATES PATENT OFFICE.

HARRY a. noun; or mnnnnrown, ennenon'en zr. INGRAHAM, or. wns'rHARTFORD,

CONNECTICUT, ASSIGNORS TO THE OHIO MFG. (30., OF MIDDLETOWN,CONNECTICUT,

A CORPORATION.

INSUJ LA'IIHG, WATERPROOF SOLE FOR USE ON BOOTS AND SHOES.

To all whom it may concern:

Be it known that we, lIARRY M. Bonn and GEORGE J. INGRAHAM, citizens ofthe United States, residing, respectively, at Middletown, in the countyof Middlesex, and at West Hartford, in the county of Hartford, and Stateof Connecticut, have invented a new and useful Improvement inInsulating, Waterproof Soles for, Use on Boots and Shoes; and we dohereby declare the following, when taken in connection with theaccompanying drawmgs and the characters of reference marked thereon, to

be afull, clear, and exact description of the.

same, and which said drawings constitute partof this application, andrepresent, in-

Figure 1 a plan view of an insulating, waterproof rubber sole embodyingour in vention.

Fig. 2 an enlar ed view thereof in transverse section on t e line 2-2 ofFig. 1.

Our invention relates to an improved insulating, waterproof sole for useon boots and shoes, either by the manufacturer or by repairers, theobject being to provide a light and durable sole characterized by itsability to protect the foot from heat and cold.

lVith these ends in view, our invention consists in a twoart insulatingwaterproof sole consistin o a lower portion or wearing layer, an aseparately fabricated up per portion or insulating layer incorporatedwith the upper face of the lower portion and having a component ofinsulating material such as hair.

Our invention further consists-in an in-' sulating, waterproof solecomposed of a waterproof wearing portion and an insulatin portion, thetwo portions being indepen ently fabricated and united by incorporation,and the insulatin portion containing animal hair anda bin e Ourinvention further consists in certain details and features as will behereinafter described and pointed out in the claims.

In carrying out our invention, we preferably produce by the processcommonl known as sheeting, the sheets fromwhic the lower or wearingportions of the soles are cut, these sheets consisting of rubber orother vulca'nizable gum combined with asbestos fiber which by preferenceis arranged transversely to the axis of the fin- Specification ofLetters Patent. 3 Patented J 1 27', 1920 Application filed July 2, 1919.Serial No. 308,160.

- during the vulcanizationof the binder, and

because it even a ears to assist the vulcanizing process. owever, inplace of animal hair, we may employsilk or cotton, or hemp, or othervegetable fiber. As a binder for the hair or fiber, we employ rubber orsome compound containing rubber. Thus the rubber may be diluted withother gums, such as balata gum or gutta ercha.

The thickness of. the respectlve sheets fabricated for the upper andlower portions of the soles, will depend, of course, upon the use towhich they are to be put, such as the character of the boots and shoeson which they are to be used, climate, etc., etc.

The two sheets having been produced as described, are superimposed oneupon the other and united with the resultant production of a compositesheet having distinctive upper and lower portions adhered together butremaining segre ated, the segregated sheets being united by thesoftening and flowing of the rubber or other binder used in theirindependent fabrication. Out of these composite sheets, soles are cut ofthe recpllired size, the cutting being done so that t e fibers in therelatively thick wearing portion are arranged transversely, andtherefore lengthwise with respect to the axes of the soles, since inthis manner the soles are made more flexible lengthwise than crosswise,it being desirable that the soles shall be flexible lengthwise, but asrigid as possible crosswise.

After the soles have been cut from the composite sheets, they are curedb being placed in suitable molds in which t ey are subjected to heat andpressure, the curing process being the same as commonly emponents of thelower portions of the soles, and the hair and rubber components of theupper portions of the soles are, of course, mixed with suitablevulcanizing a ents pre paratory to sheeting. If desired the compositesheets may be vulcanized before the soles are cut out instead of cuttingout the soles from the raw sheets and then vulcanizin the soles as abovedescribed.

bur improved sole, in addition to furnishing the waterproofin qualitiesof rubber soles as heretofore used, provides for insulating the footfrom heat and cold which are transmitted through the ordinary rubbersoles and constitute an objection to their use. At the same time, ourimproved sole is not made appreciably heavier or bulkier than theordinary sole, while greatly increased in efficiency and comfort.

-We claim 1. Ks a new article of manufacture, an insulating waterproofsole for boots and shoes comprising a lower or wearing portion and anupper or insulating portion, these portions being separately fabricatedand united and the lower portion containing rubber an asbestos liberwhich latter is arranged transversely, or substantially transversely, tothe axis of the sole, and the upper portion containing a component ofinsulating material.

2. A a new article of manufacture, an insulating waterproof sole forboots and shoes,

consisting of an upper insulating portion and a relatively thicker loweror wearing portion, the said portions being separately fabricated andsubsequently united and incorporated, and the upper portion containing anon-absorbent animal fiber and a binder therefor.

3. As a new article of manufacture, an insulating waterproof sole forboots and shoes, consisting-of a separately fabricated lower portion andrelatively thin separately fabricated upper portion, the said portionsbeing united and incorporated, and the upper portion containinganimal'hair intermingled with a vulcanizable gum as a binder.

l. As a new article of manufacture, an insulating waterproof sole forboots or shoes, consisting of an upper or insulating portion and aseparately fabricated lower or wearing portion, united and incorporatedby heat and pressure, the upper portion containing animal hair andrubber, and the lower portion containing rubber and mineral fiber.

In testimony whereof we have signed this specification in the presenceof two subscrilr ing witnesses.

HARRY M. onn. enonen J. INGRAHAM.

\Vitnesses:

FRANK E. FERREE, Enw. H. V. BALL.

